I guess I should have been more specific, I agree with this post, both suppressed and unsuppressed they all run fine. Also with different suppressors they run fine.
Thanks for all the replys so far. I am lucky I ordered my upper when I did as Bravo Company was out of stock in just a couple hours.
I have an A5 on mine. Ran it with the standard A5 buffer (A5H2) and then A5H3. Shot PMC Bronze and Wolf Gold. Both ran perfectly. The heavier H3 was notably softer feeling with the Wolf.